Datang Institute of Technology

Xu Changsheng's answer stunned everyone in the hall.

What is science?

This is the first time they have heard of such a subject.

Xu Changsheng's voice sounded above the main hall, "It is a knowledge system that studies the essence of the world and explores the changes and laws of all things..."

In this unique era, Xu Changsheng solemnly put forward his own point of view for the first time.

He never wanted to face that kind of scene where he was abused by countless people even though he was saving lives.

He doesn't blame anyone, because their cognition is different, and he can't blame others.

But...he wanted everyone to know that their previous cognitions were all wrong and foolish.

"For example, what is mentioned in my children's popular science book is the root cause of rain, what is the reason for the change of seasons, and why is the phenomenon of alternation of day and night... Uncover their mysterious veil and see their essence. It's science."

Talk about it.

Maybe the words are a little complicated, but there are smart people in the hall, and they probably understood a little bit, so they couldn't help but look at each other, "Xu Jiazi, how can you guarantee that what you said is correct in essence, not fallacious theory?"

Xu Changsheng smiled, "This is what makes science interesting. What supports science is not belief, but evidence. In the science I talk about, every point must be based on irrefutable facts, not speculation. , relying on faith to talk nonsense."

"It's like what you say about demons causing trouble. Do you have any basis? It's just your previous beliefs that support your idea, but the fact is that it's groundless and nothing but imagination."

This is the case in this era. Many things are supported by long-standing habits and beliefs without any scientific basis.

Xu Changsheng continued, "The scientific basis I'm talking about is the result of countless experimental verifications. From now on, every point of view I preach must be demonstrated with specific experiments. This is also the most basic support for scientific theories. s things."

Demonstrate with specific experiments

The theory Xu Jiazi said is interesting, and it is completely different from the current theory.

Today's theories do not have anything to prove by experiments. They are mostly evidences of the heart and idealism. This is one of the reasons why ancient thinkers and philosophers flourished.

What Xu Changsheng proposed is more of a materialist thought, which is very different from idealism.

At least in the eyes of the officials in the palace, the novelty was beyond imagination.

Xu Changsheng continued, "Your Majesty, the reward I want is nothing else, that's all."

A chance to teach.

Li Shimin thought more in his mind, Xu Jiazi's theory was simply in opposition to Dong Zhongshu's sense of heaven and man.

The relationship between heaven and man is idealism, the sharpest sword that hangs above the imperial power and controls it.

There is no factual evidence for Dong Zhongshu's sense of heaven and man, if Xu Jiazi uses such experiments to overthrow them one by one...

That would be interesting.

Li Shimin remained calm and said, "What do you guys think?"

Changsun Wuji stood up, "I think it's good, but it's just a propaganda. Whether others can accept it or not depends on whether Xu Jiazi's theory is recognized by everyone."

He is throwing at Sangyu and repaying with peaches and plums. The Xu family has made the prince's reputation soaring. It is not wrong for him to help in this matter now.

How would you evaluate Changsun Wuji?Say he is a good official, but he really isn't. Many times his selfishness outweighs his heart for the country and the people. Say he is a treacherous official who hides filth, but it is not to that extent.

Kong Yingda frowned. How could His Majesty Li Er, a representative of Confucianism, not be aware of the problem that the descendants of Confucianism could see.

Interaction between man and nature is one of the important academic studies in Confucianism, and Xu Jiazi's so-called science refers directly to the interrelationship between man and nature.

But... Confucianism in troubled times, Buddhism and Confucianism in prosperous times, in the final analysis, Confucianism also serves the emperor, and the use of heaven and man to control the imperial power is to oppose Confucianism and the emperor. In addition, Dong Zhongshu's heaven and man are not compatible with his Confucianism , Don't forget that the child is silent and strange.

What this sentence says is, what are scholars doing talking about gods and ghosts!

What Li Shimin is thinking now, he probably knows better than anyone in the hall.

Sighing, he stood up and said to Xu Changsheng, "Xu Jiazi, I hope you don't forget that you came from the Imperial College, your teachers were mostly Confucian scholars, and your grandfather Xu Wenyuan was also a great Confucianist."

After finishing speaking, he didn't say anything else. After all, Xu Jiazi was only four years old. Even if he was given this opportunity, it might not have any impact on the deep-rooted theory of interaction between heaven and man.

Xu Changsheng was taken aback for a moment, then quickly cupped his fists and replied, "Students, remember."

What he preaches is not Confucianism, so the biggest difficulty is actually these great Confucians. After all, Confucianism is the only prominent school in the world.

Don't underestimate this point, don't forget, in the era of letting a hundred schools of thought come together, the ferocity of the battles among the various schools of thought, the famous Mohists, miscellaneous schools and strategists, were not all defeated by Confucianism.

These seemingly powerless scholars are truly bloodless people. If these great Confucian scholars make things difficult for him, his path of publicity will be full of difficulties.

Xu Changsheng actually didn't have any opinion on Confucianism, and even admired it a little bit. Confucianism has some bad points, but there are more good points. Otherwise, it is not without reason that Confucianism has been dominant for thousands of years.

In modern times, there are many people who belittle Confucianism, saying that Confucianism constrains their thoughts. In fact, they are just staring at the bad side of Confucianism and stepping on it, but not seeing its good side. The light doesn't go anywhere.

Among the civil servants, some people frowned, but seeing that Kong Yingda, the representative of the Confucianism School, didn't say anything, they had no choice but to quiet down.

Seeing that no one objected, Li Shimin said with a smile on his face, "Xu Jiazi, as you please, a four-year-old child can preach his own academics. open."

"Your Majesty, the great Tang Dynasty is just around the corner." The officials shouted in unison, this is a kind of expectation for a better future.

Xu Changsheng also had a smile on his face, this was his first real step in Datang.

The hall is full of joy.

At this time, a messenger ran in, "Your Majesty, there is a bizarre robbery in Chang'an."

Everyone was stunned. Is it necessary to report a robbery to the Golden Palace?

I couldn't help pricking up my ears, I'm afraid there is something strange about this matter.

The messenger glanced at Xu Changsheng, and then said, "The Xu family caravan was robbed by a group of masked men with extraordinary skills outside Chang'an City, and Xu's supermarket was also broken into by a group of masked men at the same time."

Xu Changsheng was stunned, it was actually related to their Xu family?

Their family has just started, and they are not considered rich. What are these people robbing?Grab oil?Shouldn't you steal their dried tofu?that's too...

The messenger continued, "The thing that was robbed was the immortal book that the Xu family was going to sell in the Xu's supermarket. There is not a single copy left, and all other items are intact."

Grab... grab what?

Xu Changsheng was taken aback. The masked man with extraordinary skills, with such a big fanfare, dared to commit crimes despite the fact that this place was under the emperor's feet, just to snatch his children's popular science books?

Wait, ancient books were very expensive. Leaving aside the printing process, the paper alone cost a lot of money to buy.

Xu Changsheng's face turned dark. This time he suffered a terrible loss. He couldn't help saying, "These thieves are too courageous. They dared to rob in Chang'an in broad daylight."

Xujiacun earns hard-earned money, but he was robbed like this, and he was furious, "Who the hell is it that other things remain intact, only my books are robbed?"

He was only interested in the Xu family's fairy books, and he was also very skilled. In the main hall, Li Chunfeng frowned. This matter may have something to do with more and more Taoist family members in Chang'an City recently. He is a Taoist family member. He knows best how tempting the fairy book is to them, but didn't Xu Jiazi say it all?It was sold in Xu's Supermarket, how could these people still try to snatch it.

Li Chunfeng is just guessing, and Taoism really offended His Majesty if he said it. Where is the way.

The one with the darkest face is probably His Majesty Li Er. He just rewarded the Xu family, but someone robbed the Xu family in Chang'an. This is the hero who robbed him under his nose.

Without getting angry, he said, "When did the law and order in Chang'an become so slack?"

The faces of a few people below turned pale. They were saying that they had neglected their duties. They hurriedly came out to plead guilty.

"Through the investigation, it is necessary to give peace to the people of Chang'an." Li Shimin said.

"The minister waits for orders."

The originally happy hall was also disturbed by this incident.

When Xu Changsheng left, he was half happy and half unhappy.

He is happy because he has the qualifications to teach, but he is not happy because he really suffered a big loss this time.

He had to hurry to see the damage.

He rode Dabai to Xu's supermarket, and there were many people around the supermarket, all watching the excitement.

Xu Changsheng let Dabai open the way.

"Xu Jiazi, don't think we are afraid of the big bug, we know it doesn't bite."

"That's right, don't think we're afraid of you showing its teeth."

Xu Changsheng: "..."

That's what he said, but the way still gave way.

When Xu Changsheng walked in, his uncle Xu Zheng and the team from the Xu family who delivered the fuel were there.

"Are you all right?" Xu Changsheng asked quickly.

"It's okay, those gangsters didn't dare to hurt anyone, they just snatched the books and ran away." The uncle said, "All the books you brought to Chang'an were taken away, and a few books that were originally going to be placed in the store were also taken away." Robbed."

The first batch of books were brought to Chang'an together with the pencils. There were not many of them, and they are gone now.

"Strange to say, we also shipped oil and dried chickpeas, but they didn't grab any of it."

Xu Changsheng thought to himself, who said it was not for money?It doesn't seem to be the case, after all, their oil is also valuable, so it makes no sense not to steal it together.

No matter how I think about it, I can't figure it out, so I can only say, "Your Majesty has ordered a thorough investigation, and I hope to recover some of my books."

After finishing speaking, he looked at the supermarket, and just turned down a few shelves and stood them up. He said, "Continue to operate, the dried bean curds still have to be sold."

Uncle nodded.

This time, chickens were brought in, and Xu Changsheng was worried that he had no money to use recently. The money from selling the chickens last time was all used to buy piglets.

Chicken cubs are sold around the door with bamboo weaving.

Before shouting, someone came up and asked, "Is the price of your chickens still the same as last time? If I buy a hundred."

The last time Xu's chicken cubs were sold, the people who bought them were overjoyed, because most of them survived, and they were extremely healthy. The survival rate of chickens bought from other people's houses was so high.

Although Xu's chicken cubs are a little bit more expensive, but after careful calculation, they still took advantage of the boss.

So when they heard that the Xu family was selling chicken cubs again, they rushed over.

Also, the neighbors of those who bought the chicken cubs, seeing the healthy and good-looking chicken cubs, have long been extremely envious, so they rushed over to buy them.

"The Xu family's chicken cubs are spiritual. You don't need to take care of them when you buy them back. They will learn to go home by themselves in a day or two."

"Yeah, it's still in good shape. Last time I bought it at the same time as others, and it turned out that my family's is a circle bigger than others'."

This is word of mouth, especially in ancient times, there is no need to worry about selling word of mouth.

Xu Changsheng looked at the chicken cubs that were being sold one after another, and then he was a little happier. Fortunately, the chickens were not taken away.

Xujia Supermarket is considered to be operating normally again.

However, Xu Changsheng said at the gate of the Imperial College in the morning that Xu's Supermarket would sell his popular science books for children.

Some people rushed over, intending to buy a fairy book that was passed down miraculously, but they were told that the book was robbed on the way, and they were taken aback when they heard it.

Xu Jiazi's Immortal Book became even more miraculous.

What exactly is inside?Actually, people disregarded the king's law and robbed both inside and outside Chang'an City.

"Xu Jiazi, you said that you can buy fairy books in Xu's Supermarket. We came all the way here and that's the result."

Xu Changsheng was also very helpless. He didn't want this result either, so he could only say, "I'll trouble you to wait for a while. After my Xu family prints a new book, it will be shipped to Xu's supermarket for sale as soon as possible."

"At that time, more people knew about it, and they didn't know if we could still buy it."

But there is no way, the books have been robbed, and they can't buy them even if they want to buy them.

He left with some reluctance, and when he left, he even swept away a batch of newly-launched dried tofu.

Now there is no plastic bag packaging, so they are wrapped in oiled paper and placed on the shelf. It looks as simple and beautiful as the plastic packaging.

The only downside is that the storage time is not long enough, but there is no need to worry about this problem now, because it will be sold out soon, and it has become a fashion to eat dried tofu on the streets of Chang'an.

Xu's spicy dried tofu and Xu's oil are equally famous.

Xu Changsheng smiled, he had already asked his clan uncles to buy chicken feet, maybe there will be another new product in Xujia Supermarket tomorrow.

Thinking about the common people of Tang Dynasty, holding chicken feet with pickled peppers in their hands, the picture, he thought it was funny.

In the next few days, people came every day to ask if there were any fairy books for sale, but how could it be so fast, it would be impossible to print a few copies and ship them to Chang'an.

I don't know how many people are waiting for Xu Jiazi's fairy book, and the whole Chang'an seems to be paying attention to this matter.

Nowadays, Xu Changsheng doesn’t have children’s popular science books in his hands. There are only two books in total that he knows where to go. One is in the hands of His Majesty Li Er. It was not returned to him.

There is another one at Brother Changbai's, which is his textbook. Ever since he knew that someone had robbed the book, Brother Changbai hid the book on his chest every day and covered it tightly, as if everyone wanted to see the robber. Don't show it, and don't go out all day, for fear of being robbed.

Xu Changsheng thought about it. Although the book was robbed, it also made his popular science books for children more legendary.

Where there are disadvantages there are advantages.

His eyes moved, so he took advantage of this enthusiasm to announce something.

On the day of the beginning of summer on the fifth day of May, at the gate of the Guozijian, the news that Xu Jiazi preached the fairy book caused a whirlwind throughout Chang'an.

This is what he got in exchange for saving the people of Jiangnan Road, so he has to use it.

Don't underestimate this reward, if it weren't for his credit for saving the people of Jiangnan Road, it is still unknown whether he can stop the opposition of those Confucian scholars.

Now no one knows what is in his children's popular science books. As soon as the news of him came out, it spread throughout Chang'an in an instant, and one can imagine the sensation it caused.

"Xu Jiazi actually started talking about fairy books? I don't know if he's talking about revealing characters out of thin air, or the legendary art of summoning wind and rain?"

"There's news from the court, isn't there any skill to summon wind and rain?"

"Then you don't have to listen."

"This...such a grand event can't be absent."

Xu Changsheng is also preparing. Since it is the first lesson, he has to let everyone witness the miracle of science and the practicality of science. In this way, more people will be interested in his science, and more people will be willing to learn. Get rid of the false and save the true, and there will no longer be such absurd things as getting sick and pinning your hopes on offering sacrifices to heaven.

For this reason, Xu Changsheng also enlisted the help of several clan uncles to help him and made a lot of props for lectures.

He said that his views will be verified by experiments and provide scientific basis. This is the fundamental difference between materialism and idealism.

……

When Xu Changsheng was busy, Xu's Supermarket's new pickled pepper chicken feet also began to appear on the market.

Packs of white and clean chicken feet look very appetizing, which is very different from those sold in other small shops that don't pay much attention to hygiene.

The hygienic habits of the restaurants that open food shops and restaurants are really not very good, especially the conditions in the back kitchen are even worse.

Xu Changsheng knows the importance of hygiene, especially when it comes to eating.

Therefore, this point alone has won praise from many people in Chang'an.

Of course, due to convention, the price of chicken feet is very high, but if you are a member of Xujia Supermarket, you only need [-]% off. Chicken feet are already cheaper than chicken, so if you buy a big bag, it is still very cost-effective. The key is it The taste is really delicious, no one can refuse it.

Before the launch of new products, there are still activities to launch new products.

Cut the chicken feet into small pieces, put them on a plate, and then provide toothpicks for everyone to taste for free.

There are lessons learned from the spicy dried tofu, and the people of Chang’an seem to know that this is a free trial. There is a long queue early in the morning, especially a group of children, who have been waiting eagerly.

Uncle Xu Zheng was very happy to see it. He didn't understand why it was provided for free before, but with the popularity of spicy dried tofu, he understood that this is a necessary investment in the early stage. Look, who is in Chang'an now? I didn't know that their dried tofu is very delicious.

Their store is in the West Market, but many people from the East Market come to buy their dried tofu, and they often hear complaints about why the Xu Family Supermarket is not open in the East Market.

The charm of chicken feet with pickled peppers is probably irresistible to both adults and children.

Many adults, after tasting it, bought a large pack directly. Since then, spicy dried tofu has been relegated to the second place in the snack industry.

The children had no money, so they ran to the back to queue again, smiling, but they were happy, because they queued repeatedly, and the Xu family would not talk about them. They wished that Xu’s supermarket had new products on the market every day, so that they could eat many.

Someone also asked, every time your Xujia Supermarket has a new product, you get so many free tastings, is it not afraid of losing money in business?

Uncle Xu Zheng smiled and said, "On the door plaque of our Xujia Supermarket, there are four words "beneficial to the country and the people". Of course, if there is any good thing, we must share it with everyone as soon as possible."

Earned rave reviews.

Uncle is now more and more good at doing business.

In fact, the main reason is that they are a monopoly business. After trying their new products, they can only buy them here. If they taste other mass products, they will know that they are good things after tasting them, and they will go to the nearest place to buy them. up.

When Xu's Supermarket was carrying out new product launch activities, Xu Changsheng wandered around outside to see if there were any new and interesting things as topics that could be used in his May [-]th propaganda.

After walking for a long time, Xu Changsheng couldn't move his legs anymore.

It's not that I found any good topics.

But...

"Ahhh!" Xu Changsheng screamed and ran up, swinging his legs.

This is West Market, and he discovered Hu Shang.

He has seen a lot of foreigners, and there is nothing unusual about it. The key point is that this merchant sells his goods everywhere with a black and white cow.

Xu Changsheng swears, this fucking cow is definitely a cow, and it is also a black-and-white cow with a high milk yield. This damn Hu merchant actually used his treasure to solicit goods.

Look at this black and white fur color, it's so fucking beautiful.

The goods of Hu merchants are generally exotic goods, mostly jewelry and glass, and the price is expensive, so there are not many people in front of the booth.

When the Zhenguan of the Tang Dynasty started, there were already some signs of the prosperity of the Zhenguan. Many foreign businessmen came to Chang'an one after another to do business with the Tang Dynasty.

Xu Changsheng ran up and looked at the bearded businessman.

Hu Shang was also taken aback for a moment. He didn't expect a child to run up to him and said in a strange Tang Dynasty official accent, "Little friend, there is nothing you want here. Go home and let your adults take a look."

Although the sound is weird, it can still be distinguished by listening carefully.

Xu Changsheng thought to himself, why not? He wanted the cow pulling the cart, pointed at the black and white cow with his little hand, "Uncle, where did you get this cow?"

The merchant Hu guessed that there was no business, so he chatted with Xu Changsheng, "I bought it from a Persian merchant. I don't know where the Persian merchant got such a strange cow."

Their Hu merchants have passed through too many regions, and they often exchange goods. This cow doesn't know how many times it has passed through hands.

The Hu businessman was still complaining, "This cow is not good. Although it is quite tall, it can't pull much goods. The Persian businessman cheated me..."

This Hu businessman actually used his baby to solicit goods, not to mention his lack of strength. It is used to produce milk, not to solicit goods.

After Xu Changsheng released the milk-producing rabbit to the forest, he never drank milk again.

He has had the habit of having a glass of milk every day for many years, and he was not used to it when he had no milk at first.

But there is no way, this is Datang, where did the cows come from.

He remembered that the official introduction of cows was still in the [-]th century. It was estimated that some foreign businessmen might have brought some cows, but none of them were on a large scale.

Xu Changsheng's eyes moved, "Uncle, how about I trade a cow that pulls a cart with you?"

Look at this cow, because the skin on the back of the cart is worn out, and although it is big, it is not very thin, so it must not have been raised properly.

Hu Shang's eyes lit up, he seemed to replace the cow, but can a child have the money to buy a cow?Cattle were a great productivity in Datang, and the value can be imagined.

Xu Changsheng probably also saw the meaning of the other party, and said, "Uncle, wait for me for a while, I will go home and ask my adults to buy your cattle."

He didn't have the money with him, and he was also afraid that the Hu merchant would not dare to sell the cattle to him.

After all, he is a businessman from a foreign land. If he misunderstood that he was cheating a child, he would probably be beaten by the tough people of Datang.

Hu Shang had already set up a stall here, and he would not leave for the time being, so he nodded, and of course he didn't take it seriously.

Xu Changsheng reluctantly left, then returned home quickly, took the money he had just earned from selling the chicken cubs, called two clan uncles, and rushed to the West Market again, fearing that the Hu businessman would run away.

Fortunately, when they went, the Hu businessman was still there.

Hu Shang received the money, and was stunned for a while, but someone actually bought his useless cow.

Hu Shang smiled treacherously, and Xu Changsheng also smiled treacherously. In his opinion, a cow that pulls goods is not as good as this cow.

The two clan uncles did not stop them, but they were also very puzzled, how did Changsheng buy such a strange cow.

Xu Changsheng didn't care, he smiled until his eyes narrowed, it's great, he can have milk to drink in the future.

And he knew that domestic dairy cows are all hybrids of this kind of cows and cattle, which means that there is no species barrier, they are all cows.

He can even imagine that he will raise a mountain of black and white flowers in the future, and he will have milk every day.

Driving the cattle home, brother Changbai ran out, "Changsheng, why do you buy strange things every time you go out and come back, you have spent all your money again, hmph, I'm still thrifty."

After speaking, he also took out his only penny to see how long he had spent this penny, but he didn't use it up.

Xu Changsheng didn't explain either, he didn't expect to find something good for him after shopping around, his eyes twinkled, and in the future he would go to Hu Shang's shop to see if he could pick up some good things when he had time.

This cow has traveled through mountains and rivers, but it is already very dirty.

But it doesn't matter, I called Brother Changbai, and the two of them fetched water to give it a bath.

It is May day now, the sun has started to be a little hot, and the water is not cold.

Brother Changbai has always been curious, why buy such a strange cow?

Xu Changsheng pointed to the row of cows below, and whispered, "Understood?"

Brother Changbai lost his brush, "Chang... Changsheng, you don't want to drink milk again, you are so old, you will be laughed at."

In the Tang Dynasty, goat’s milk actually existed, but most of them were in cities close to the grassland tribes. Chang’an City also had it, but it didn’t become popular. Moreover, goat’s milk was smelly and difficult to handle, and people who liked it probably didn’t like it. many.

After taking a good bath for the black and white flower, it really looks a lot prettier, even Brother Changbai doesn't dislike it anymore.

A pot of bean dregs was brought, and the cow ate it suddenly, as if it hadn't eaten for a long time.

Look, how hungry it is, it's so pitiful.

Xu Changsheng knew that feeding cows with bean dregs could increase their milk production, so he was not stingy at all, and he still used uncooked bean curd, which was more nutritious, for feeding.

This cow has a good physique, and after feeding it for a few days, it should be able to resume milk production.

In the yard, besides big white, there are more black and white flowers.

Dabai doesn’t pay much attention to it, Black and White Flower is a little afraid of Dabai and doesn’t dare to get close to it, it is estimated that it has been beaten before, so it is very timid, every day it hides in its small fast place in the corner, eating it happily can’t finish it Bean dregs, this is probably the happiest day it has ever had.

The black and white flowers are recovering day by day, Xu Changsheng has to lie on the ground and watch for a long time every day, Brother Changbai is so young that he is so ashamed that he covers his face.

Xu Changsheng just ignored him, don't drink the milk he boiled when he has the ability.

……

Time flies, and the weather is getting hotter and hotter. It's only May now, and I don't know how hot it will be in July and August.

A batch of popular science books for children newly printed by Xujia Village has been smuggled to Chang'an.

Really sneaky.

Xu Changsheng thought to himself, last time it might be because he said that Xu's supermarket would sell his book, so someone snatched it according to the time, so this time it was done quietly.

He did not sell the book in supermarkets either.

Because it's still a little hot.

And this time is May [-]th, the time for him to go to school.

Now in Chang'an, what the common people are most concerned about is probably the matter of Xu Jiazi's lecture on the fairy book.

Not only ordinary people, but also some inexplicable people are more concerned.

At the entrance of the Guozijian, a lot of Taoist priests have appeared recently, and they seem to want to come to occupy a seat in advance.

But there is a curfew in Chang'an, it's useless for them to wander there all day, because they still have to leave when it gets dark.

May [-]th is Lixia.

Spring goes to summer solstice, which indicates that the warmest spring has passed.

On this day, just after dawn and the curfew ended, a group of Taoist priests went to occupy their seats.

Originally, many scholars also came very early, but it turned out that there were a large number of people, so they had to sit down in a circle outside.

It's the kind of sitting cross-legged, in a circle.

Xu Changsheng also got up early in the morning. After a few days of preparation, everything he wanted was ready, and he went to check it out, so he was relieved.

Today is a great day for him. Whether the seeds of science can be planted in the hearts of the Tang people depends on today.

At dawn, there was already a lot of traffic at the gate of the Imperial College.

This scene was breathtaking, and even some great Confucian scholars were a little envious. They had never seen such a big fight when they were teaching.

This is the result of brewing these days.

"Why hasn't Xu Jiazi come yet?" Some people don't know how many times they are asking.

"Couldn't he have forgotten what day it is?"

"You really think of him as an ordinary kid, probably not." But he was a little unconfident no matter what.

In fact, Xu Changsheng was just moving things with the Xu family, so he came... a little late.

Perhaps because it happened to be the beginning of summer today, the sun was stronger than in the past few days, and many people began to wipe their sweat non-stop. There is no shade here, and the sun is shining directly.

"The weather is as hot as it is hot, and the changes are too fast."

"Who says it's not? If I wasn't really curious about the contents of the fairy book that Xu Jiazi talked about, I would have left long ago in such a hot day."

"Yeah, look, a few people have left."

"Let's hold on for a while longer. If Xu Jiazi really talks about calling the wind and rain, those who leave will regret it to death."

In addition to these scholars and common people, there were several sedan chairs standing in front of them. The doors of the sedan chairs were not opened, and it was unknown who was sitting inside.

But looking at the guards who surrounded the sedan chair, they probably couldn't afford to mess with them.

The identities of the people in these sedan chairs are indeed harmful. Xu Changsheng's good friend Prince Li Chengqian is one of them, and there are even more powerful ones. His Majesty Li Er, the emperor of the Tang Dynasty, is also there, and Li Tai also follows Li Er. Join in the fun, but the weather is too hot and I can't stand it anymore, "Father, what is the Xu family doing? You really forgot, right? Why don't you come?"

Just as they were talking, Xu Changsheng and the members of the Xu family just arrived, and the sun is almost noon now.

At the gate of the Guozijian, there is a large open space, which is where the doctor of Xuanxue stands, so as to avoid unnecessary accidents, which has always been the case.

What Xu Changsheng is wearing today is a small long gown, carved in pink and jade, with a white jade flute hanging around his waist. Xuanxue, he would not go even if he was beaten to death.

After changing the clothes, the temperament of the person has changed, the original cuteness is less, and the unique atmosphere of the scholar is more.

In addition, Yan Wenshu wished to whip him with a stick every day to correct his etiquette, which made people's eyes shine. No matter how good a four-year-old child's manners are, there are times when he is mischievous, how can he look like Xu Changsheng now.

It's just a little old-fashioned from a scholarly family.

Xu Changsheng walked up, without squinting, with a flat face, every step, every swing of his arm, seemed to be pregnant with a unique charm of a scholar.

In one place, a little old man sitting cross-legged snorted coldly, "It's a shame."

It's not who Yan Wenshu is that little old man.

The few doctors from the Imperial College next to him looked at each other, and thought, you just have to be cocky, don't they know what the wild monkey Xu Jiazi was like before?In addition to being taught like this, there is a failure, not a slapstick.

Xu Changsheng saluted respectfully.

Before he could speak, someone said, "Xu Jiazi, you can start directly, we are not all scholars, so put away your old-fashioned rules of scholars."

Xu Changsheng thought to himself, would he dare?He took a sneak peek just now, and there are many doctors from the Imperial College, as well as the little old man Yan Wenshu. If something really happens to him, can the little old man give him little shoes?

He is teaching now, even though he is the only one standing here, the relationship among the ancients is very complicated. If he misbehaves, it may even involve his grandfather and the teacher who taught him. This is what he has to do. The reason for being so cautious.

This kind of complex relationship network is hard to explain. Anyway, the ancient teachers and students are not only the relationship between teaching and learning, but also go deeper. Pass over.

Xu Changsheng made another salute in a proper manner, and then he said, "The sage in "The Analects of Confucius Shuer" said that if three people walk together, there must be my teacher. If you can't live forever, you will come here today as promised, and I will talk about one A new theory, a science..."

Talking eloquently, it can be regarded as explaining the ins and outs of why he came here to give lectures.

Many scholars couldn't help nodding their heads. They deserved to be from Xu Wenyuan's lineage, and they deserved to be able to enter the Imperial College at a young age. Not many people can do this kind of decent conversation alone.

However, now it is a gathering of three religions and nine streams, not only scholars who have learned etiquette, but also many ordinary people in the market.

Someone shouted, "Xu Jiazi, you better hurry up and say, what's the use of your science, why should we listen?"

"That's right, what is this science, I have never heard of it, you still tell us about the words written out of thin air in the fairy book, calling the wind and calling the rain..."

"We are all here for this reason, Xu Jiazi should not be a fool."

Xu Changsheng didn't take it too seriously, because he had already imagined that this situation might happen. Science was something unfamiliar to them, and most people even misunderstood it as the theory of gods and ghosts.

He didn't tell the truth, because things have to come little by little.

Xu Changsheng arched his hands, "Everyone can come to listen to Changsheng's lectures in such a hot summer, Changsheng is very honored."

After a pause, "Someone just asked what science is? What is the use of science? Then Changsheng will tell you."

After finishing speaking, he continued, "The science that Changsheng talked about is the content of the fairy book you said, and I named this book...Children's popular science books."

Children's popular science books?

Why does it sound so strange, like a book for enlightenment for children.

"As for what's the use of science?" Xu Changsheng looked at the sky and asked, "Everyone thinks it's hot right now?"